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Gas-filled hollow core fibers allow the generation of single-cycle pulses at megahertz repetition rates. When coupled with difference frequency generation, they can be an ideal driver for the generation of carrier-envelope phase stable,…

We present a proof-of-principle way to generate nondegenerate multipartite continuous-variable entanglements via atomic spin wave induced by the strong coupling and probe fields in the Lambda-type electromagnetically induced transparency…

Quantum Physics · Physics 2015-06-04 Xihua Yang , Yuanyuan Zhou , Min Xiao

We analyze the generation of polarization cross-talk in Stokes polarimeters by atmospheric seeing, and its effects on the noise statistics of spectropolarimetric measurements for both single-beam and dual-beam instruments. We investigate…

Instrumentation and Methods for Astrophysics · Physics 2015-05-28 Roberto Casini , Alfred G. de Wijn , Philip G. Judge

We investigate the spin correlations between electron-positron pairs created from a photon when it scatters in a high-intensity laser pulse via the nonlinear Breit-Wheeler process. We find that the spin states of the generated…

High Energy Physics - Phenomenology · Physics 2025-04-10 S. Tang , B. M. Dillon , B. King

We consider the creation of polarization entangled light from parametric down- conversion driven by an intense pulsed pump inside a cavity. The multi-photon states produced are close approximations to singlet states of two very large spins.…

Quantum Physics · Physics 2009-11-10 Christoph Simon , Dik Bouwmeester

We propose a scheme to generate entanglement between a single-photon qubit in the polarization basis and a coherent state of light. The required resources are a superposition of coherent states, a polarization entangled photon pair, beam…

Quantum Physics · Physics 2015-02-04 Hyukjoon Kwon , Hyunseok Jeong

The emission of entangled light from planar semiconductor microcavities is studied and the entanglement properties are analyzed and quantified. Phase-matching of the intra-cavity scattering dynamics for multiple pump beams or pulses,…

Quantum Physics · Physics 2015-06-05 D. Pagel , H. Fehske , J. Sperling , W. Vogel

We study the photon emission from a quantum dot embedded in a microcavity. Incoherent pumping of its excitons and biexciton provokes the emission of leaky and cavity modes. By solving a master equation we obtain the correlation functions…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 J. I. Perea , C. Tejedor

The unconditional entanglement swapping for continuous variables is experimentally demonstrated. Two initial entangled states are produced from two nondegenerate optical parametric amplifiers operating at deamplification. Through…

Quantum Physics · Physics 2009-11-10 Xiaojun Jia , Xiaolong Su , Qing Pan , Jiangrui Gao , Changde Xie , Kunchi Peng

We propose a method for the generation of a large variety of entangled states, encoded in the polarization degrees of freedom of N photons, within the same experimental setup. Starting with uncorrelated photons, emitted from N arbitrary…

Quantum Physics · Physics 2015-01-15 A. Maser , R. Wiegner , U. Schilling , C. Thiel , J. von Zanthier

We study a proposal of generating macroscopic continuous-variable entanglement with two coupled waveguides respectively carrying optical damping and optical gain. Moreover, a squeezing element is added into one or both waveguides. We show…

Quantum Physics · Physics 2017-09-13 Saeid Vashahri-Ghamsari , Bing He , Min Xiao

The quantum Zeno effect reveals that the continuous observation of a quantum system can result in significant alterations to its evolution. Here, we present a method for establishing polarization entanglement between two initially…

Quantum Physics · Physics 2022-08-31 Ian C. Nodurft , Harry C. Shaw , Ryan T. Glasser , Brian T. Kirby , Thomas A. Searles

A quantum-mechanical many-particle system may exhibit non-local behavior in that measurements performed on one of the particles can affect a second one that is far apart. These so-called entangled states are crucial for the implementation…

Other Condensed Matter · Physics 2009-11-10 J. M. Bao , A. V. Bragas , J. K. Furdyna , R. Merlin

We experimentally demonstrate a non-local generation of entanglement from two independent photonic sources in an ancilla-free process . Two bosons (photons) are entangled in polarization space by steering into a novel interferometer setup,…

Quantum Physics · Physics 2010-05-11 Xian-Min Jin , Jügen Röch , Juan Yin , Tao Yang

A beam splitter is a basic linear optical element appearing in many optics experiments and is frequently used as a continuous-variable entangler transforming a pair of input modes from a separable Gaussian state into an entangled state.…

We generalize a new approach to entanglement conditions for light of undefined photons numbers given in [Phys. Rev. A {\bf 95}, 042113 (2017)] for polarization correlations to a broader family of interferometric phenomena. Integrated optics…

Quantum Physics · Physics 2018-03-02 Junghee Ryu , Marcin Marciniak , Marcin Wieśniak , Marek Żukowski

We propose an operational degree of polarization in terms of the variance of the projected Stokes vector minimized over all the directions of the Poincar\'e sphere. We examine the properties of this degree and show that some problems…

The experimental implementation of the polarization encoding system is presented using weak coherent pulses at a low enough frequency. The optical pulses are generated through intensity modulation at the repetition rate of $10$ pulses/sec…

Quantum Physics · Physics 2025-06-04 Zeshan Haider

Entangled photon sources (EPSs) are pivotal in advancing quantum communication, computing and sensing. The demand for deploying efficient, robust EPSs in the field, characterized by exceptional (phase) stability, has become increasingly…

Quantum Physics · Physics 2024-07-12 Giacomo Paganini , Alvaro Cuevas , Robin Camphausen , Alexander Demuth , Valerio Pruneri

We propose an alternative scenario for the generation of entanglement between rotational quantum states of two polar molecules. This entanglement arises from dipole-dipole interaction, and is controlled by a sequence of laser pulses…

Quantum Physics · Physics 2016-08-16 Eric Charron , Pérola Milman , Arne Keller , Osman Atabek